X / Twitter Video Aspect Ratio & Frame Checker
X supports video uploads across square (1:1), widescreen (16:9), and immersive mobile portrait (9:16) orientations. Validate your production dimensions to avoid black bar padding or weird stretching in timelines.
🚀 How to Use the X / Twitter Video Aspect Ratio Checker (1:1, 16:9, 9:16)
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01
Select a frame screenshot or promotional cover graphic for your video.
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02
Switch between 1:1, 16:9, and 9:16 framing templates to confirm ratio alignment.
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03
Ensure your footage conforms to standard specifications before transcoding.
Platform Dimensions & Formatting Reference for X / Twitter
Display dimensions, character boundaries, and mobile safe zones tested on current X / Twitter app versions.
| Specification | Platform Standard | Recommended Practice |
|---|---|---|
| Platform & Aspect Ratio | X / Twitter (9:16 Vertical Video) | Full-Screen Mobile Fit |
| Canvas Dimensions | 1080 × 1920 px (9:16) | Safe Margin > 120px padding |
| Mobile App Interface Overlays | Bottom 350px & Right 120px Icons | Keep Subtitles in Upper 65% Area |
| Recommended Video Format | MP4 / MOV (H.264, sRGB Color) | Bitrate <= 15 Mbps, 30-60 FPS |
| Safe Zone Verification | Key Visuals Free of UI Obstruction | 100% Legible on Mobile Screens |
Creator Guidelines & Practical Tips
When posting on X / Twitter, keeping captions and subtitles within visible safe zones prevents your message from being covered by mobile app icons (like buttons, comment trays, usernames, or audio tags). For text posts, proper line spacing ensures your paragraphs remain clean and readable across both iOS and Android apps.
All previews and checks in X / Twitter Video Aspect Ratio Checker (1:1, 16:9, 9:16) run 100% client-side inside your web browser. Your drafts, captions, and media are never uploaded to any remote server, giving you complete privacy and instant feedback.
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💡 Frequently Asked Questions
Q: What is the maximum video file size and duration on X?
Standard users can upload videos up to 140 seconds (512MB), whereas Premium subscribers can share videos lasting several hours up to 8GB.
Q: What export resolution should I target for X when the checker says my video is '9:16'?
Target a consistent vertical frame size like 1080x1920 (or 720x1280). If the checker flags 9:16 but your resolution isn’t a standard upload size, X may re-encode and you can get unexpected cropping.
Q: Can I upload a 16:9 video to X and still get a good-looking result if it’s slightly off-ratio?
Try to keep it exact—within a 1–2 pixel tolerance. If it’s notably off, X will letterbox or crop depending on the container, and engagement often drops because the “safe area” is inconsistent.
Q: Which pixel dimensions should I use when preparing an X video for 1:1, 16:9, or 9:16?
Use dimensions with the same mathematical ratio: 1080×1080 for 1:1, 1920×1080 or 1280×720 for 16:9, and 1080×1920 for 9:16. Check the exported file itself because editing-project settings can differ from the final video.
Q: Why does my X vertical video pass visually but fail the aspect-ratio check?
The file may contain hidden padding, a 4:5 canvas, or metadata that differs from its preview. Calculate width ÷ height from the encoded dimensions and re-export without automatic crop, borders, or embedded player framing.
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